United StatesAverage weather for Key West in May
It's hot in May in Key West with an average temperature of 30°C. Temperatures this month range from a low of 29°C to a high of 31°C. At night, you can expect temperatures between 24°C and 27°C.
Start of May
The month of May starts in Key West with hot temps, averaging around 30°C during the day and nights around 25°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
Mid May
By mid-May, daytime temps rise to around 31°C, with nights around 26°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
End of May
By the end of May, the average daytime temperature in Key West is around 31°C, while nighttime temps are about 27°C. A shower might pop up, but overall, the weather will be dry and sunny. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
Water temperature
The water temperature at Key West is 30°C this month. It’s really warm, perfect for a swim.
In May, there is an average of 93 mm of precipitation, spread over 7 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
Key West in May |
New York | ||
|---|---|---|---|
 Average temperature |
30°C | 22°C | |
 Max. temperature |
31°C | 28°C | |
| Min. temperature |
29°C | -5°C | |
 Total precipitation |
93 mm | 105 mm | |
| Rainy days |
7 days | 14 days | |
April
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is May a good time to visit Key West?
May is a good month to be in Key West for sunny weather. You’ll have high temperatures and not too much rain.
The hurricane season in Key West runs from June to November.
Temperature records
With 33°C in 2019, Key West reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 25°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of 18°C to a highest value of 29°C.
Check out the climate of Key West for all months and discover the best travel time
Daily Temperature in May in Key West
This chart shows the average daily high and low temperatures in May for Key West, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in May in Key West
The chart below shows the average daily precipitation in May for Key West, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for May, you can expect about 7 days of precipitation in Key West.
Daily UV index in May in Key West
This chart shows the average daily UV index in May in Key West, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Key West over the years
This chart shows the average temperature in May in Key West, measured in degrees Celsius, over the past few years.
Total precipitation in May in Key West over the years
This chart shows the average precipitation in May in Key West, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in May for Key West
Click on any day in May to get detailed info about the usual weather on that day in Key West. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Key West
Have you been to Key West in May?
Share your weather experience in May in Key West.
Average weather in Key West by month
Click on a month below to see detailed weather info for Key West. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
